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小麦生物量和真实叶面积指数的高光谱遥感估算模型

DOI: 10.6046/gtzyyg.2012.04.06, PP. 30-35

Keywords: 小麦,生物量,真实叶面积指数,高光谱遥感

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Abstract:

利用大田小麦的参数数据和冠层光谱数据,基于光谱一阶微分技术和光谱响应函数,构建等效MODIS植被指数,建立小麦生物量(本文指总干生物量,下同)和真实叶面积指数的高光谱遥感估算模型。结果表明:1小麦生物量与冠层光谱在552nm,721nm处呈现最显著相关关系,叶面积指数与冠层光谱的相关性在400~1100nm范围内较显著;2红边位置与生物量的关系最为显著,相关系数R为0.818;36种等效MODIS植被指数中,增强型植被指数对生物量最为敏感;4红边位置估算小麦总生物量的指数模型最优,决定系数R2为0.829;5增强型植被指数与小麦叶面积指数的指数模型拟合度最强,决定系数R2为0.94。利用实测光谱模拟MODIS等效反射率构建植被指数反演小麦参数的方法,可为利用卫星数据进行大面积、无破坏和及时获取地面植被信息研究提供重要手段。

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